Depending on you application, you may achieve more neutral handling from 315's. Variables include front tire width, rear suspension type, engine output and weight distribution.

Im running 18x12 with a 335/30/18 tire.. lots of room but then again it is not the DSE mini-tub :)

What he said.. a 335 is too big if you are running a 235 or maybe even a 245 up front.. I am running 275's up front so I can get away with a little more.. at least I hope..

once again you guys have given me a ton of info thanks.. i really want to squeeze some meat like jon adams did under the rear. I would like to know if i go with 18 instead of 17 are there any clearance issues in the front? i am confident i can massage the rear for clearance. i would like to go with 17 X 12 in the rear or 17 X 13 and 17 X 8 in the front. it appears that jon did no more than a standard dse mini-tub and it all clears fine.

gmac454

red car
 

is stuart adams car
yes he has just a standard dse mini tub, that and a rolled 1/4 lip you can get 335s in there no problem, its just you gotta make your backspace perfect to center wheel in wheelwell
i would go 18's on a 67-68, no problems up front, also a 12 inch rim is optimal for a 335
jake